Lady Gaga, holding a simulated machine gun shakes and rubs her head briefly before leaving the stage. She continued the show, which was part of a world tour.

Lady Gaga did not let a bump on the head stop the presentation. Lady Gaga's makeup artist Tara Savelo wrote Monday on Twitter: "Gaga has a concussion, but she will be fine I cannot believe she was able to end the show."

New Zealand’s Gaga publicist Bridget de Launay said on Monday it was seeking comments from the organizers of the concerts, adding that all the programs were sold out in Auckland and it was a "great success".